Oscilla annulata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.OBIS : Oscilla annulata; retrieved: 29 January 2012
Description The length of the whitish shell measures 5 mm. The numerous whorls of the teleoconch are flattened, and spirally ribbed. Their interstices are longitudinally striated. The columella has a single posterior plication. The lip is subcrenulated, the interior lirate.G.W. Tryon, Manual of Conchology vol.VIII p. 309 (described as Pyramidella (Oscilla) annulata)
Distribution This marine species occurs in the demersal zone off the Philippines, Singapore and Japan.
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